FR NG Input: disable midi devices on demand

[MStraeten]

If several midi devices are used, the midi input number can change in dependency of used devices. so assigned accels to a midi device might not be recognized if further midi devices are added or removed.

example: when having an keyboard stack attached the xtouch mini used for darktable gets a different midi input number . so defined accels doesnt work workaround: copy the accels for each possible midi input number:

None;midi:CC1=iop/exposure/exposure
None;midi1:CC1=iop/exposure/exposure
None;midi2:CC1=iop/exposure/exposure
...

But that might mess up stuff if the other midi devices send something that's not filtered ...

Describe the solution you'd like

• ability to exclude midi devices from being recognized via preferences

Alternatives

• ability to identify midi devices by its source name to be independend of changing midi input numbers (I'm not sure if that's possible)
• ability to detect the midi input number in preferences dialog and then remap accels

[dterrahe]

What I intend to implement is assigning a midi device by name to a certain device id, so it will always have the same id. It may even be useful to do this automatically the first time a not recognised device is connected. The simple approach will not work if you have two devices of the same type or more than 10 devices (even if not at same time).

[github-actions[bot]]

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